11gR2:What if Oracle gives you Kernel parameter fixup script

11gR2 database installation comes up with new  feature known as Installation Fixup scripts which aids you during Installation phase.  If a pre-requisite check fails, then it provides a click and generate fixup script option and then points you to script location which then need’s to be executed  with root permission. As per doc’s , it takes care of following things

– Checks and sets kernel parameters to values required for successful installation, including:Shared memory parameters,Semaphore parameters and Open file descriptor and UDP send/receive parameters

– Sets permissions on the Oracle Inventory directory.

– Reconfigures primary and secondary group memberships for the installation owner, if necessary, for the Oracle Inventory directory, and for the operating system privileges groups.

– Sets up virtual IP and private IP addresses in /etc/hosts.

– Sets shell limits to required values, if necessary.

– Installs the Cluster Verification Utility packages (cvuqdisk rpm).

Below are screenshot for error’s encountered as a result of missing kernel settings in sysctl.conf file



Below is output of running the script as root

cat orarun.log
This is the log file for orarun script
Timestamp: 090109150435
Response file being used is :/tmp/CVU_11.
Enable file being used is :/tmp/CVU_11.
Setting Kernel Parameters...
file-max in response file:6815744
file-max in /etc/sysctl.conf:6815744
The value for file-max in response file is not greater than value for file-max in /etc/sysctl.conf file. Hence not changing it.
file-max for current session:6553600
ip_local_port_range in response file:9000 65500
ip_local_port_range in /etc/sysctl.conf:9000 65000
ip_local_port_range for current session:1024 65000
aio-max-nr in response file:1048576
aio-max-nr in /etc/sysctl.conf:1048576
The value for aio-max-nr in response file is not greater than value for aio-max-nr in /etc/sysctl.conf file. Hence not changing it.
aio-max-nr for current session:65536

Before running the script, I had modified the file without executing sysctl -p to implement the changes.  Fixup script log  shows that it checks the file again and replaces parameter if required and then executes sysctl command to  make changes persistent.

Amit Bansal

Experienced professional with 16 years of expertise in database technologies. In-depth knowledge of designing and implementation of Disaster Recovery / HA solutions, Database Migrations , performance tuning and creating technical solutions. Skills: Oracle,MySQL, PostgreSQL, Aurora, AWS, Redshift, Hadoop (Cloudera) , Elasticsearch, Python

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